EP0645678B1 - Strahlungsempfindliche Zusammensetzung - Google Patents

Strahlungsempfindliche Zusammensetzung Download PDF

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Publication number
EP0645678B1
EP0645678B1 EP94306945A EP94306945A EP0645678B1 EP 0645678 B1 EP0645678 B1 EP 0645678B1 EP 94306945 A EP94306945 A EP 94306945A EP 94306945 A EP94306945 A EP 94306945A EP 0645678 B1 EP0645678 B1 EP 0645678B1
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EP
European Patent Office
Prior art keywords
radiation
acid
sensitive composition
acrylate
meth
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EP94306945A
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English (en)
French (fr)
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EP0645678A1 (de
Inventor
Yusuke Japan Synthetic Rubber Co. Ltd. Tajima
Nobuo Japan Synthetic Rubber Co. Ltd. Bessho
Hiroaki Japan Synthetic Rubber Co. Ltd. Nemoto
Fumine Shitani
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JSR Corp
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Japan Synthetic Rubber Co Ltd
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
    • G03F7/0007—Filters, e.g. additive colour filters; Components for display devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
    • G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
    • G03F7/033—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers

Definitions

  • This invention relates to a radiation-sensitive composition. More specifically, this invention relates to a pigment-dispersed radiation-sensitive composition which has a good dispersibility of a pigment, a good adhesion to a substrate and excellent coating properties, and which is suited for use in formation of a color filter used in a liquid crystal display device or a solid state imaging device.
  • a dyeing method, a printing method and an electrodeposition method have been hitherto known.
  • a lithographic method using a colored radiation-sensitive composition is particularly arousing interest from the aspects of a purity, a dimensional accuracy and a process resistance.
  • the radiation-sensitive composition is coated onto a black matrix formed on a glass substrate with a spin coater or the like, and dried to form a coating. The coating is then exposed to light and developed to obtain a colored pixel. This process is repeated several times using radiation-sensitive compositions different in color to give a color filter.
  • a pixel obtained by using the conventional radiation-sensitive composition is easily peeled off from the substrate, and tends to give the color filter a deficiency.
  • Laid-open European Patent No. 0564168A2 proposes a radiation-sensitive composition for use in a color filter containing an alkali-soluble block copolymer of a specific structure as a binder, a radiation-sensitive compound and a pigment.
  • Another object of this invention is to provide a pigment-dispersed radiation-sensitive composition which does not cause the surface soiling, which is excellent in adhesion of a formed pixel to a glass substrate, and which is suited for use in formation of a color filter.
  • Still another object of this invention is to provide a pigment-dispersed radiation-sensitive composition which does not cause the surface soiling on a black matrix and a glass substrate. which gives a pixel excellent in adhesion to the black matrix and the glass substrate, which is excellent in coating properties, and which is suited for use in formation of a color filter.
  • a radiation-sensitive composition which comprises: a radiation-sensitive composition, which comprises:
  • the word "radiation” referred to in this invention is used under a concept hat this word includes a visible light, an ultraviolet light, an electron beam and X-rays.
  • a copolymer comprising a monomer containing an alcoholic hydroxyl group (A-1) (hereinafter referred to as "(A-1)”), a macromonomer (A-2) (hereinafter referred to as “(A-2)”), and two comonomers, copolymerizable with the above monomers (A-3), (A-4) (hereinafter referred to as "(A-3)", “(A-4)” respectively) is used as the binder polymer (A).
  • (A-1) is preferably an unsaturated compound containing at least one alcoholic hydroxyl group in the molecule.
  • Specific examples of (A-1) include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, N-hydroxymethylacrylamide, 2-hydroxy-3-phenoxypropyl acrylate. polyethylene glycol mono(meth)acrylate and polypropylene glycol mono(meth)acrylate. Of these. 2-hydroxyethyl methacrylate is especially preferable as (A-1).
  • the binder polymer (A) is a block copolymer having (A-2) as a copolymer component of the binder polymer (A), which is one of the characteristic features of this invention.
  • (A-2) is preferably a compound having preferably one polymerizable carbon-carbon double bond in the molecule.
  • (A-2) has a number average molecular weight (hereinafter referred to as "Mn"), calculated as polystyrene, of 1,000 to 10,000, especially 2,000 to 8,000.
  • Such (A-2) is a homopolymer or a copolymer at least one monomer selected from the group consisting of styrene, an alkyl (meth)acrylate, acrylonitrile, vinyl acetate, butadiene and isoprene, said homopolymer or copolymer having a (meth)acryloyl group at one terminal position of the molecule.
  • Macromonomer (A-2) has a (meth)acryloyl group at one terminal position of the molecule, such as a polystyrene oligomer, a polymethyl (meth)acrylate oligomer or a polybutyl (meth)acrylate oligomer.
  • a polystyrene oligomer such as a polystyrene oligomer, a polymethyl (meth)acrylate oligomer or a polybutyl (meth)acrylate oligomer.
  • a polysilicone oligomer having a (meth)acryloyl group at one terminal position of the molecule is also preferably used as (A-2).
  • (A-3) is another monomer copolymerizable with said (A-1) and (A-2) which is at least one monomer selected from the group consisting of an arylalkyl (meth)acrylate, a butadiene and an isoprene.
  • Preferred examples of (A-4) include (meth)acrylic acid, crotonic acid, itaconic acid and fumaric acid
  • the amount of (A-1) in the binder polymer (A) is preferably 5 to 30 parts by weight, more preferably 10 to 20 parts by weight per 100 parts by weight of all the monomers.
  • the amount of (A-2) is preferably 1 to 50 parts by weight, more preferably 5 to 20 parts by weight per 100 parts by weight of all the monomers.
  • the amount of (A-3) and (A-4) is a balance of the amounts of (A-1) and (A-2).
  • binder polymer (A) examples include a 2-hydroxypropyl (meth)acrylate/polystyrene macromonomer/benzyl methacrylate/methacrylic acid copolymer, a 2-hydroxy-3-phenoxypropyl acrylate/polymethyl methacrylate macromonomer/benzyl methacrylate/methacrylic acid copolymer, and a 2-hydroxyethyl methacrylate/polystyrene macromonomer/benzyl methacrylate/methacrylic acid copolymer.
  • An adhesion of a formed pixel to a black matrix and a glass substrate can be improved by introducing the alcoholic hydroxyl group via (A-1) into the binder polymer (A).
  • (A-1) in the above amount further improves the adhesion of the formed pixel to the substrate and makes it hard to cause the surface soiling on the black matrix and the glass substrate in the non-pixel portion.
  • the binder polymer (A) is a graft polymer having (A-2) as the copolymer component. This enables to increase an affinity for a pigment and remarkably to improve a uniformity of a coating and a solubility of a non-pixel portion that is developed with an alkali.
  • the binder polymer (A) further has (A-3) and (A-4) as the copolymer components, making it possible to adjust solubility of the binder polymer (A) in alkali and increase a film formability and a heat resistance.
  • the binder polymer (A) used in this invention has a weight average molecular weight (hereinafter referred to as "Mw”), calculated as polystyrene, of preferably 5,000 to 50,000, more preferably 10,000 to 30,000, measured by gel permeation chromatography (carrier: tetrahydrofuran).
  • Mw weight average molecular weight
  • the binder polymer (A) having such Mw can be obtained by radical-polymerizing (A-1), (A-2), (A-3) and (A-4) in the presence of a solvent.
  • a chain transfer agent can be used.
  • an ⁇ -methylstyrene dimer is preferable because color change by heat less occurs in producing a color filter from the composition of this invention that contains the binder polymer (A).
  • the ⁇ -methylstyrene dimer is used in an amount of 0.01 to 20 parts by weight, more preferably 0.1 to 10 parts by weight per 100 parts by weight of all the monomers.
  • ⁇ -styrene dimer examples include the following isomers
  • organic or inorganic pigments are used as the pigment (B).
  • the organic pigments are dyes or pigments insoluble in water or an organic solvent. Specific examples of the organic pigment include compounds which are grouped into pigments shown in a color index (published by The Society of Dyers and Colourists).
  • the inorganic pigments are metallic compounds, i.e., metal oxides and metal complex salts.
  • metallic compounds i.e., metal oxides and metal complex salts.
  • oxides of metals such as iron, cobalt, aluminum, cadmium, lead, copper, titanium, magnesium, chromium, zinc and antimony, and complex oxides of said metals.
  • pigment (B) examples include compounds with the following color index CI numbers.
  • These pigments can be used either singly or in combination.
  • the pigment (B) is used in an amount of usually 10 to 1,000 parts by weight, preferably 20 to 500 parts by weight per 100 parts by weight of the binder polymer (A).
  • the radiation-sensitive compound (C) used in this invention is (1) a compound that allows a polymerization chain transfer reaction of a polymerizable carbon-carbon double bond or (2) a compound that enters in a carbon-carbon bond or a carbon-hydrogen bond to form a crosslinked structure between molecules by, upon irradiation with radiation, absorbing the energy to generate active seeds such as a radical, nitrene and methylene in the electronically excited state.
  • the compound (1) is, for example, a compound that generates the radical upon irradiation with radiation, i.e., a compound having an unsaturated double bond which is polymerized upon irradiation with radiation, such as a radiation polymerization initiator or a radiation-polymerizable monomer or oligomer.
  • Examples of the radiation polymerization initiator include:
  • Examples of the radiation-polymerizable monomer or oligomer include polyvalent acrylates such as trimethylolpropane triacrylate, pentaerythritol triacrylate, trisacryloyloxyethyl phosphate, pentaerythritol tetracrylate, dipentaerythritol pentacrylate and dipentaerythritol hexacrylate; a condensate of 4-azidobenzaldehyde and polyvinyl alcohol, a condensate of 4-azidobenzaldehyde and a phenolic novolac resin, and a polymer or a copolymer of 4-acryloylphenylcinnamoyl ester.
  • polyvalent acrylates such as trimethylolpropane triacrylate, pentaerythritol triacrylate, trisacryloyloxyethyl phosphate, pentaerythritol tetrac
  • the radiation-polymerizable monomer or oligomer can be used in such an amount as not to impair the objects and the effects of this invention so long as the composition of this invention can form a coating having an adhesion upon irradiation with radiation.
  • the compound (2) is a compound containing at least 2 functional groups that generate a radical, carbene and nitrene upon irradiation with radiation, i.e., a radiation crosslinking agent.
  • Examples of the radiation crosslinking agent include diazidocalcon, 2,6-bis(4'-azidobenzal)-cyclohexanone, 1,3-bis(4'-azidobenzal)-4-methylcyclohexanone, 1,3-bis(4'-azidobenzal)-2-propane, 1,3-bis(4'-azidocinnamylidene)-2-propane, 4,4'-diazidostilbene and ammonium dichromate.
  • This combination is, for example, a combination of 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one, 1-hydroxycyclohexylphenylketone or 2-benzyl-2-dimethylamino-1-(4-morphorinophenyl)-butan-1-one as the radiation polymerization initiator and pentaerythritol triacrylate or dipentaerythritol hexacrylate as the radiation-polymerizable monomer.
  • the radiation polymerization initiator is used in an amount of 0.01 to 200 parts by weight, preferably 1 to 120 parts by weight, per 100 parts by weight of the radiation-polymerizable monomer.
  • the radiation-sensitive compound is used in an amount of usually 10 to 200 parts by weight, preferably 20 to 150 parts by weight per 100 parts by weight of the binder polymer (A).
  • amount is less than 10 parts by weight, a vividness of a pixel tends to be insufficient.
  • amount exceeds 200 parts by weight, the film-remaining easily occurs on a non-pixel portion.
  • composition of this invention can contain, as required, a variety of additives such as a filler, a polymeric compound other than the binder polymer (A), a surface active agent, an adhesion promoter, an antioxidant, an ultraviolet absorber and an agglomeration preventing agent.
  • additives such as a filler, a polymeric compound other than the binder polymer (A), a surface active agent, an adhesion promoter, an antioxidant, an ultraviolet absorber and an agglomeration preventing agent.
  • Specific examples of these additives are as follows.
  • Specific examples of the filler include a glass and alumina.
  • Specific examples of the polymeric compound other than the binder polymer (A) include polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether and polyfluoroalkyl acrylate.
  • Specific examples of the surface active agent include nonionic, cationic and anionic surface active agents.
  • adhesion promoter examples include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(2-methoxyethoxy)silane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane.
  • antioxidant examples include 2,2-thiobis(4-methyl-6-tert-butylphenol) and 2,6-di-tert-butylphenol.
  • ultraviolet absorber examples include 2-(3-tert-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole and alkoxybenzophenone.
  • agglomeration preventing agent examples include sodium polyacrylate.
  • the composition of this invention can contain an organic carboxylic acid, preferably an organic carboxylic acid having a low molecular weight of 1,000 or less.
  • organic carboxylic acid examples include aliphatic monocarboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, valeric acid, pivalic acid, caproic acid, enanthic acid and caprylic acid; aliphatic dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, brassylic acid, methylmalonic acid, ethylmalonic acid, dimethylmalonic acid, methylsuccinic acid, tetramethylsuccinic acid and citraconic acid; aliphatic tricarboxylic acids such as tricarballylic acid, aconitic acid and camphoric acid; aromatic monocarboxylic acids such as benzoic acid, toluic acid, cuminic acid, hemellitic acid and mesitylenic acid; aromatic polycarboxylic acids
  • composition of this invention can be prepared by mixing and dispersing the binder polymer (A), the pigment (B) and the radiation-sensitive compound (C) and as required, the other components in the presence of a solvent using, for example, a ball mill, a pebble mill, a shaker, a homogenizer, a triple roll mill, a sand mill or a nanomizer.
  • a solvent for example, a ball mill, a pebble mill, a shaker, a homogenizer, a triple roll mill, a sand mill or a nanomizer.
  • the composition of this invention can be also prepared by dispersing the pigment (B), e.g., a pigment having an average particle diameter of 1 ⁇ m or less in a dispersion medium containing a dispersant and a solvent (preliminary dispersing step), then dispersing the thus-obtained preliminary dispersion at high pressure of 100 kg/cm 2 or more (high pressure dispersing step), adding the binder polymer (A) and the radiation-sensitive compound (C) and as required, the other components to the thus-prepared pigment dispersion, and mixing them with the above-mentioned dispersing device.
  • This method can reduce depolarization (scattering of a polarized light) of a color filter.
  • dispersants which can be used in the preliminary dispersing step.
  • specific examples thereof include phthalocyanine derivatives (EFKA-745, a trade name for a produce of Morishita & Co., Ltd); cationic surface active agents such as an organosiloxane polymer KP341 (a trade name for a product of The Shin-etsu Chemical Industry Co., Ltd.), (meth)acrylic acid-containing copolymers Polyflow No.75, No. 90, No.
  • nonionic surface active agents such as polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene nonylphenyl ether, polyethylene glycol dilaurate, polyethylene glycol distearate and sorbitan aliphatic acid ester; fluorine-containing surface active agents such as EFTOP EF301, EF303, EF352 (trade names for products of Tohken Products Co., Ltd), Megafac F171, F172, F173 (trade names for products of Dainippon Ink & Chemicals, Inc.), Fluorad FC430, FC431 (trade names for products of Sumitomo 3M, Ltd.), ASAHI GUARD AG710, Surflon S-382, SC-101, SC
  • These dispersants may be used either singly or in combination.
  • the dispersant which is contained in the pigment dispersion is used in an amount of usually 0.1 to 50 parts by weight per 100 parts by weight of the pigment.
  • solvent used to prepare the composition of this invention examples include:
  • methyl 3-ethoxypropionate ethyl 3-ethoxypropionate, ethyl cellosolve acetate, ethyl lactate, diethylene glycol dimethyl ether, butyl acetate, methyl 3-methoxypropionate, 2-heptanone, cyclohexanone, ethyl carbitol acetate, butyl carbitol acetate and propylene glycol methyl ether acetate.
  • the solvent is used in an amount of usually 100 to 4,000 parts by weight, preferably 200 to 2,000 parts by weight per 100 parts by weight of the pigment.
  • the pigment is dispersed in the dispersion medium containing the dispersant and the solvent.
  • the dispersing is usually conducted with a dispersing device or a kneading device such as a ball mill, a dissolver, a homomixer, a kneader, a triple roll mill or a sand mill.
  • a dispersing device or a kneading device such as a ball mill, a dissolver, a homomixer, a kneader, a triple roll mill or a sand mill.
  • the triple roll mill or the sand mill is preferably used.
  • the pigment having an average particle diameter of preferably 1 ⁇ m or less is dispersed.
  • the average particle diameter of the pigment is more preferably 0.05 to 0.7 ⁇ m, especially preferably 0.05 to 0.4 ⁇ m.
  • the viscosity of the preliminary dispersion is 50,000 mPa.s or less, preferably 20,000 mPa.s or less, more preferably 10,000 mPa.s or less.
  • the other components may be contained, as required, in the preliminary dispersion.
  • the preliminary dispersion is subjected to a dispersing treatment under pressure of 100 kg/cm 2 or more, preferably 300 kg/cm 2 or more.
  • the dispersing treatment is conducted, for example, under the above high pressure with a high-pressure dispersing device that allows liquid-liquid impinging at high speed, e.g., a microfluidizer (manufactured by Microfluidics), ULTIMIZER (manufactured by Hosokawa Micron K.K.) or T.K. NANOMIZER (manufactured by Tokushu Kika Kogyo K.K.).
  • a high-pressure dispersing device that allows liquid-liquid impinging at high speed
  • a microfluidizer manufactured by Microfluidics
  • ULTIMIZER manufactured by Hosokawa Micron K.K.
  • T.K. NANOMIZER manufactured by Tokushu Kika Kogyo K.K.
  • the pigment has the average particle diameter of 0.05 to 0.7 ⁇ m, preferably 0.05 to 0.4 ⁇ m.
  • the viscosity of the pigment dispersion is 50,000 mPa.s or less, preferably 20,000 mPa.s or less, more preferably 10.000 or less.
  • the other components which are used as required can be contained in the pigment dispersion.
  • the above-obtained pigment dispersion has the excellent dispersibility of the pigment without agglomeration of the pigment particles and can maintain the dispersed state of the pigment even if stored for a long period.
  • composition of this invention is prepared by adding the components for forming the composition of this invention, i.e., the binder polymer (A) and the radiation-sensitive compound (C) to the above-obtained pigment dispersion, and mixing them with the high-pressure dispersing device such as abovementioned.
  • the composition of this invention is coated on a substrate by coating such as rotation coating, cast coating or roll coating to form a radiation-sensitive composition layer, and the radiation-sensitive composition layer is exposed to light through a predetermined mask pattern and developed with a developer to form a colored pattern.
  • Radiation which is used on this occasion is especially preferably ultraviolet rays such as g rays and i rays.
  • the substrate examples include a soda glass used in a liquid crystal display device, a pyrex glass, a quartz glass, these glasses having a clear electroconductive film deposited thereon, and a photoelectric converter substrate used in a solid state imaging device, such as a silicon substrate.
  • Black stripes by which to partition pixels are generally formed on the substrate.
  • an alkaline aqueous solution is used in which an alkaline compound is dissolved in an amount of 0.001 to 10 % by weight, preferably 0.01 to 1 % by weight.
  • the alkaline compound include sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, aqueous ammonia, ethylamine, diethylamine, diethylethanolamine, tetramethylammonium hydroxide, tetraethylammonium hydroxide, choline, pyrrole, piperidine and 1,8-diazabicyclo-[5,4,0]-7-undecene.
  • the substrate is generally rinsed with water after the development.
  • the above raw materials were charged into an autoclave equipped with a stirrer, and stirred at room temperature until a uniform mixture was obtained. Then, the temperature was elevated to 80°C. Thereafter, the temperature was maintained at 80°C for 3 hours, and then at 100°C for 2 hours. The mixture was cooled to room temperature to obtain a polymer solution A. During this time, nitrogen was passed through the inside of the autoclave to shut off air and stirring continued.
  • the polymerization yield of the polymer solution A (concentration of the polymer 30 % by weight) was 98 %.
  • Mw of the polymer (hereinafter referred to as a "polymer A") in the polymer solution A was 25,000 (as measured with HLC-802A manufactured by Tosoh Corporation).
  • the above raw materials were mixed and dispersed with a ball mill.
  • the dispersion was filtered with a filter (having a performance to cut a foreign matter having a particle diameter of 2.5 ⁇ m by 95 %) to obtain a dispersion of a composition of this invention.
  • This dispersion was coated on a glass substrate having formed thereon a black matrix made of chromium to a dry film thickness of 2 ⁇ m with a spin-coater, and the thus-coated substrate was dried at 80°C for 10 minutes to obtain a red uniform coating.
  • the above-coated substrate was irradiated with 100 mJ/cm 2 of a light energy by means of a high-pressure mercury arc lamp through a photomask having a mask hole width of 10 to 100 ⁇ m for evaluation of resolution, developed with a 0.1 % aqueous solution of tetramethylammonium hydroxide, rinsed with water, and then dried at 180°C for 1 hour.
  • the thus-obtained pixel had a pattern of fine lines having a width of 10 to 100 ⁇ m.
  • the pattern was, when observed with an optical microscope, a pattern having sharp edges. Further, the non-pixel portion was free from the surface soiling. Still further, even if a pattern of fine lines having a width of 5 ⁇ m or less was formed, delamination did not occur, and the pixel was one which can be suitably used in a color filter of high accuracy.
  • the above raw materials were mixed and dispersed with a ball mill.
  • the dispersion was filtered with a filter (having a performance to cut a foreign matter having a particle diameter of 2.5 ⁇ m by 95 %) to obtain a dispersion of a composition of this invention.
  • This dispersion was coated on a glass substrate having formed thereon a black matrix made of chromium to a dry film thickness of 2 ⁇ m with a spin-coater, and the thus-coated substrate was dried at 80°C for 10 minutes to obtain a red uniform coating.
  • the above-coated substrate was irradiated with 100 mJ/cm 2 of a light energy by means of a high-pressure mercury arc lamp through a photomask having a mask hole width of 10 to 100 ⁇ m for evaluation of resolution, developed with a 0.1 % aqueous solution of tetramethylammonium hydroxide, rinsed with water, and then dried at 180°C for 1 hour.
  • the thus-obtained pixel had a pattern of fine lines having a width of 10 to 100 ⁇ m.
  • the pattern was, when observed with an electron microscope, a pattern having sharp edges. Further, the non-pixel portion was free from the surface soiling. Still further, even if a pattern of fine lines having a width of 5 ⁇ m or less was formed, delamination did not occur, and the pixel was one which can be suitably used in a color filter of high accuracy.
  • the above raw materials were mixed and dispersed with a ball mill.
  • the dispersion was filtered with a filter (having a performance to cut a foreign matter having a particle diameter of 2.5 ⁇ m by 95 %) to obtain a dispersion of a composition of this invention.
  • This dispersion was coated on a glass substrate having formed thereon a black matrix made of chromium to a dry film thickness of 2 ⁇ m with a spin-coater, and the thus-coated substrate was dried at 80°C for 10 minutes to obtain a green uniform coating.
  • the above-coated substrate was irradiated with 100 mJ/cm 2 of a light energy by means of a high-pressure mercury arc lamp through a photomask having a mask hole width of 10 to 100 ⁇ m for evaluation of resolution, developed with a 0.1 % aqueous solution of tetramethylammonium hydroxide, rinsed with water, and then dried at 180°C for 1 hour.
  • the thus-obtained pixel had a pattern of fine lines having a width of 10 to 100 ⁇ m without depolarization (scattering of a polarized light).
  • the pattern was, when observed with an optical microscope, a pattern having sharp edges. Further, the non-pixel portion was free from the surface soiling. Still further, even if a pattern of fine lines having a width of 5 ⁇ m or less was formed, delamination did not occur, and the pixel was one which can be suitably used in a color filter of high accuracy.
  • the pigment-dispersed radiation-sensitive composition of this invention can provide a pixel of high accuracy by a photolithographic method, does not cause the surface soiling on the black matrix and the glass substrate, gives a pixel excellent in adhesion to the black matrix and the glass substrate, is excellent in coating properties, and is suited for use in a color filter.
  • the pigment-dispersed radiation-sensitive composition of this invention can be suitably used in the production of color filters including a color filter for coloration of a liquid crystal display device and a color filter for color resolution of a solid state imaging device in an electronic industry.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optical Filters (AREA)
  • Materials For Photolithography (AREA)
  • Macromonomer-Based Addition Polymer (AREA)

Claims (12)

  1. Eine strahlungsempfindliche Zusammensetzung, umfassend:
    (A) ein Binderpolymer, welches ein Copolymer ist, erhalten durch Polymerisieren:
    (A-1) einer ungesättigten Verbindung, welche mindestens eine alkoholische Hydroxylgruppe in dem Molekül enthält,
    (A-2) eines Macromonomeren, enthaltend eine (Meth)acryloylgruppe an einer Endposition des Moleküls und mit einem Molekulargewicht-Zahlenmittel, berechnet als Polystyrol, von 1000 bis 10 000, und
    (A-3) eines weiteren Monomeren, welches copolymerisierbar mit dem (A-1) und (A-2) ist, welches mindestens ein Monomer ausgewählt aus der Gruppe aus einem Arylalkyl(meth)acrylat, einem Butadien und einem Isopren ist, und
    (A-4) einer ungesättigten Carbonsäure, die copolymerisierbar mit dem (A-1), (A-2) und (A-3) ist;
    (B) ein Pigment;
    (C) eine Strahlungspolymerisationsverbindung, umfassend:
    (C-1) eine Kombination von:
    (C-1-a) einem Strahlungspolymerisationsinitiator, und
    (C-1-b) einem strahlungspolymerisierbaren Monomeren oder Oligomeren, oder
    (C-2) ein Strahlungsvernetzungsmittel; und gewünschtenfalls
    (D) eine organischen Carbonsäure, die mindestens eine Säuregruppe in dem Molekül enthält und ein Molekulargewicht von 1000 oder weniger hat.
  2. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei das Copolymer durch radikalische Polymerisation in der Anwesenheit eines α-Methylstyroldimeren als ein Kettentransfermittel erhalten ist.
  3. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei die ungesättigte Verbindung, die die alkoholische Hydroxylgruppe (A-1) enthält, mindestens ein Glied ausgewählt aus der Gruppe aus 2-Hydroxyethyl(meth)acrylat, 2-Hydroxypropyl(meth)acrylat, N-Hydroxymethylacrylamid, 2-Hydroxy-3-phenoxypropylacrylat, Polyethylenglykolmono(meth)acrylat und Polypropylenglykolmono(meth)acrylat ist.
  4. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei das Macromonomer (A-2) ein Homopolymer oder ein Copolymer ist, welches mindestens ein Glied ausgewählt aus der Gruppe aus Styrol, einem Alkyl(meth)acrylat, Acrylnitril, Vinylacetat, Vinylpyridin, Butadien und Isopren umfaßt, wobei das Homopolymer oder Copolymer eine Methacryloylgruppe an einer Endposition des Moleküls enthält und ein Molekulargewicht-Zahlenmittel von 1000 bis 10 000 hat.
  5. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, welche die organische Carbonsäure (D) enthält, und wobei die organische Carbonsäure aus der Gruppe aus Itaconsäure, Malonsäure, Citraconsäure, Mesaconsäure, Fumarsäure und Phthalsäure ausgewählt ist.
  6. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei das Binderpolymer ein Durchschnittsmolekulargewicht, berechnet als Polystyrol, von 5 000 bis 50 000 hat.
  7. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei das Binderpolymer (A) ein Glied ausgewählt aus der Gruppe aus einem
    2-Hydroxypropyl(meth)acrylat/Polystyrolmacromonomer/Benzylmethacrylat/Methacrylsäurecopolymer,
    einem 2-Hydroxy-3-Phenoxypropylacrylat/Polymethylmethacrylatmacromonomer/Benzylmethacrylat/Methacrylsäurecopolymer, und
    einem 2-Hydroxyethylmethacrylat/Polystyrolmacromonomer/Benzylmethacrylat/Methacrylsäurecopolymer ist.
  8. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei das Pigment (B) in einer Menge von 10 bis 1000 Gewichtsteile pro 100 Gewichtsteile des Binderpolymeren (A) verwendet wird, und die Gesamtmenge des Strahlungspolymerisationsinitiators und des strahlungspolymerisierbaren Monomeren oder Oligomeren 20 bis 150 Gewichtsteile pro 100 Gewichtsteile des Binderpolymeren (A) beträgt.
  9. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei (C-1-b), das strahlungspolymerisierbare Monomer, ein mehrwertiges Acrylat ist.
  10. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei (C-1), die Kombination aus (C-1-a), dem Strahlungspolymerisationsinitiator, und (C-1-b), dem strahlungspolymerisierbaren Monomeren, eine Kombination aus 2-Methyl-1-(4-Methylthiophenyl)-2-morpholinpropan-1-on, 1-Hydroxycyclohexylphenylketon oder 2-Benzyl-2-dimethylamino-1-(4-Morpholinphenyl)-butan-1-on als der Strahlungspolymerisationsinitiator und Pentaerythritoltriacrylat oder Dipentaerythritolhexacrylat als das strahlungspolymerisierbare Monomer ist.
  11. Die strahlungsempfindliche Zusammensetzung nach Anspruch 1, wobei (C-1-a), der strahlungspolymerisierbare Initiator, in einer Menge von 0,01 bis 200 Gewichtsteile pro 100 Gewichtsteile des strahlungspolymerisierbaren Monomeren verwendet wird.
  12. Verwendung der strahlungsempfindlichen Zusammensetzung nach Anspruch 1 für die Bildung eines in einer Flüssigkristallanzeige verwendeten Farbfilters.
EP94306945A 1993-09-24 1994-09-22 Strahlungsempfindliche Zusammensetzung Expired - Lifetime EP0645678B1 (de)

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EP0645678A1 (de) 1995-03-29
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DE69408761T2 (de) 1998-08-27
US5847015A (en) 1998-12-08
KR950009350A (ko) 1995-04-21

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